キーワード: 即時(shí)(shí)(shí)通訊__，企業(yè)(yè)(yè)(yè)溝通__，龍笛即時(shí)(shí)(shí)通__，視頻會(huì)(huì)(huì)議__，集成開(kāi)(kāi)發(fā)(fā)(fā)(fā)_______，金笛短信